Anatomy of the Respiratory System

Question 1

Respiratory Quotient

Answer 1

VCOz/VOz - Tells me the (rate / min) amount of COz produced vs. the (rate / min) amount of Oz consumed.

Question 2

What muscle are involved in inspirations and Exhalation?

• Explain to me

Answer 2

Inspiration (active expand cavity): External Intercostals (ribs go up and lateral) & Diaphragm (contract)

Exhalation (passive relaxation): (depress cavity): Internal Intercostals (contract) (down) when body needs to increase ventilation excessive exercise

Question 3

1) Name the structure that regulates respiration?
2) What stimulates them?
3) Which stimulant has a dominating effect?
5) Simultaneous change?

Answer 3

1) Chemoreceptors
2) oxygen, carbon dioxide, pH
3) Arterial (a) COz levels PaCOz
5) Rate and Depth of Respiration occur together

Question 4

VC - 
RV - 
FRC - 
TV -
TLC -

Answer 4

VC - Vital Capacity - gas exhaled after max inhalation
RV - Residual Vol. - gas remaining after max exhalation
FRC - Functional Residual C. - gas after tidal exhalation
TV - Tidal Volume
TLC - Total Lung Capacity

Question 5

What is MMEF? What is MET? How are both determined? Why is MMEF a valuable parameter?

Answer 5

Maximal Mid-Expiratory Flow Rate?
Mid-Expiratory Time - time expiration from 75% VC to 25%
MMEF - 1/2(VC) / MET
Least reliable parts of the curve are cut out with this parameter - middle is most reliable